Hi,
It is likely that you have a pagination issue or content is extending beyond the content area on one of the pages.
To check pagination, select each page and go to the Object > Pagination palette. Place should be "Follow previous" and After should be "Continue filling parent".
With content, like tables, etc, just make sure they don't extend beyond the content area.
Do you have multiple Master Pages?
If you are still having trouble, can you share the form? If so upload it to acrobat.com and share the published link here.
Hope that helps,
Niall